Client specifications sometimes say to assume full BM is through shaft / locking element. Some designers allow for the shell to contribute.

Have you considered sending the new tensions to the existing pulley supplier and have them check?

Regards,

Lyle ■

Thanks for the feedback.

With the assumption of 100% full bending moment the new tensions mean that some of these locking elements are underated. Where my concern is, I ran a check of the bending moment on some pulleys that have never failed which the calculations indicated that the bending moment is in excess of the locking element capacity. However, these pulleys all have considerably larger end plate thickness and shell thickness. Hence the query regarding how hub thickness affects bending moment.

The pulley supplier also does the refurbishment of the pulleys. Hence I was looking for a method of determining locking element loading independent of the supplier as a cross-check. ■

There are a number of end disc designs floating around out there. Have a gander at the following as a start:

http://www.ckit.co.za/secure/conveyo...ley/pulley.htm

http://www.saimh.co.za/beltcon/beltcon2/paper210.html

http://www.saimh.co.za/beltcon/beltcon1/paper15.html

Regards,

Lyle ■

Lyle,

Thanks for the reference to Beltcon paper 210. It contained the informaiton I was after. I can't believe I missed it when I scanned it before placing the original post.

Thanks again,

Greg ■